public class Example09 {
    public static void main(String[] args){
        int grade = 75;
        if(grade>80){
            System.out.println("该成绩的等级为优");
        }else if(grade>70){
            System.out.println("该成绩的等级为良");
        }else if(grade>60){
            System.out.println("该成绩的等级为中");

        }else{
            System.out.println("该成绩的等级为差");
        }
    }
}